CI: Temporarily disable failing on coverage upload, Codecov has issues

Author: amotl

.github/workflows/tests.yml

@@ -52,4 +52,4 @@ jobs:
       - name: Upload coverage results to Codecov
         uses: codecov/codecov-action@v3
         with:
-          fail_ci_if_error: true
+          fail_ci_if_error: false